I am at my wits end, my DD has started spitting every mouthful of food I put in her mouth at food times. Apart from making a mess of me/the highchair/kitchen/anyone in the vicinity, it means she's hardly eating any food. It doesn't matter what I give her, it still gets fired right back at me. She did this for a while when she was 6 months old, but I thought we were over it. Saying 'no' sternly reduces her to tears and makes no difference. Any suggestions?